Principal Machine Learning Engineer, Ads Delivery

About the role

Millions of people come to Pinterest to find creative ideas, dream about new possibilities, and plan for memories that will last a lifetime. Join us to help bring everyone the inspiration to create a life they love.

What You’ll Do

• Build and improve backend systems and statistical models that underlay the marketplace to maximize value for Pinners, Partners, and Pinterest.
• Define and implement experiments to understand long-term Marketplace effects.
• Develop strategies to balance long and short-term business objectives.
• Drive multi-functional collaboration with peers and partners across the company to improve knowledge of marketplace design and operations.

What We’re Looking For

• Degree in Computer Science, Machine Learning, Statistics or related field.
• 10+ years of professional experience as a hands-on engineer and technical leader leading multiple projects.
• Strong software engineering and mathematical skills with knowledge of statistical methods.
• Hands-on experience with large-scale online e-commerce systems is a plus.
• Background in computational advertising is preferred.
• Nice to Have: Experience using Cursor, Copilot, Codex, or similar AI coding assistants for development, debugging, testing, and refactoring; Familiarity with LLM-powered productivity tools for documentation search, experiment analysis, SQL/data exploration, and engineering workflow acceleration.

In-Office Requirement Statement

This role will need to be in the office for in-person collaboration 1-2 times/month, and therefore needs to be in a commutable distance from one of the following offices: San Francisco, Palo Alto, Seattle.

Relocation Statement

This position is not eligible for relocation assistance.

Pay

$314,580—$550,515 USD